During the Christmas season you can always hear Christmas music, whether it be songs, carols or instrumental. Christmas music can be heard in the background, whether in shops, restaurants, on the radio or in people’s homes, whether eating or simply relaxing, and cars. This is unlike any other holiday season, where music plays a much smaller role, at least partly due to the length of the Christmas period as compared to others. Christmas music can start appearing weeks, if not months, in advance of December and the true Christmas season. Quite often Christmas themed music drives out a significant portion of other types of music. This is presumably why so many different types of Christmas music have evolved over the years, from secular to religious and traditional to popular.